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The article presents a case study of a 62-year-old female who complains about fluctuating vision in each eye and peripheral vision loss that is with consistency with bitemporal hemianopia. A dense of bitemporal hemianopia was revealed by confrontation fields and Humphrey visual field testing. A very large mass in the suprasellar cistern that compresses the optic chiasm was revealed by magnetic resonance imaging (MRI) in the brain.

Focuses on the anterior optic chiasmal syndrome of hemianopsia or visual loss that results from the injury of Wilbrand's knee. Loop of decussating interonasal fibers that detour into the contralateral optic nerve before entering the optic tract; Pattern of visual field loss from lesions of the optic chiasm.